A Bernoulli-type non-contact adhesion pad comprises a pad area which includes an outer section of the pad area and an inner section of the pad area which is undercut relative to the outer section, at least one aperture in the inner section of the pad area for introducing a pressurised fluid flow from the aperture in use between the pad area and a surface for non-contact adhesion of the pad to the surface, an element extending from the aperture beyond the periphery of the aperture, but not the outer section of the pad area, so that the flow of fluid from the aperture is between and around the element and the periphery of the aperture, the element including an edge around the element at or beyond the aperture. A wall climbing robot using the Bernoulli-type non-contact adhesion pads is also disclosed.